Plated storage tank and method of making



Jan. 9, 1940. E. ETEICKMEYER I PLATED STORAGE TANK AND METHOD OF MAKING Filed Dec '22; 1957 R mm. mKT 9 E L. m f 1 FIG. 1. 5

A TTORNE Ysf Patented-Ian, 9, 19 10 7' STATES v 2,186,285 g PLATED STORAGE'TANK Maroon-er Earl Ei ckmeyenflD ayton blnm assignor Dayton Pump and Manufacturing Company,

Dayton, Ohio, a. corporation of Ohio -A pnmibn December 22, 1937, grass. vrams;-

j erably smaller thaiuithe names Y 4, and when is body f'tlie v 'i hls invention relates to storage'tanks' and a method of construction thereof. It is an object of this invention-to provide a -fluid storag tank fully and-entirely plated on g-interior and exterior surfaces thereof for full protection from corrosion; rusting and attackby constituents of fluid stored therein.

' It is a further object of this invention to provide a method of making a 'tankand for providing full 1 I6 coverage-by plating of all interior and exterior surfaces thereof for protection; ,1 s

' It'is a further object of this invention to provide a metho'dof securin by plating, fullcover age of all surfaces thereof, and especially surfaces ll subjected to the attack of corro'sive substances. r

' It is a further object'o ithit'} invention to provide a' method forplating aztank by immersion in aspelter bath-in, such manner that the spelter may caus to provide fullcoverag or them 2Q terior of the t nk v "n6 other metal and" advantages 'wm appear from the :following de'scriptiontaken conneotionwiththe drawing? In the drawing:

25 Figure 1 is a view, in section; of atank constructed according to the principles of thisinvention, immediately after immersion in .a spelter bath for plating by galvanization the interior and V exterior surfaces thereof;

s "30 Figure 2 is a similar view of the structure shown in" Figure "1, wherein the tank has been rotated 180 degrees;

u v detail, I "represents atank adapted to contain spelter .for' galvanizingpurposes, and 2 designates molten "spelter; therein.-

' 3 designates a tank comprising. abodyjof cylin drical. or other form having circular-for other appropriately shaped ends rigidly secured therea to in conventional-manner and provided atone side with a plurality of flanges 4 of appropriate the storage tank 3.1 p

' Spaced from these flanges A and preferably disposed oppositely with respect thereto is a vent 55 .flange iwhichjs similar thereto, although prefv vent flange .5

fspelter I H "downwardly. The spelter passes freely upward-- vided 'with a galvanized plating. "After full plating of the surfaces is achieved, the tank-Sis removed upwardly from Y the spelter'bath'! and, while in the position of "Figuref3, with theve'nt flange i'dispose'd upwa rdly'; the fullyplated plug 6 is inserted and size rigidly-secured; tofthe body-of the tank by welding or many othersuitable'manner to provide conventionalin'let and, outlet openings in likewise rigidly secured to the by welding or irr any other uitable riiarihnfi'fI-het.

secured thereto before plating or galvanization or the interior-and exterior: surfacesof the tank is" 1 begun. The flanges-are conventional, butthe After the tank '3 is'formed with the screwthreaded flanges 4 and 5 rigidly attached thereto, the tank isggraduallyjimmersed in the molten 2 in tank with the plugs [disposed 1y through the flanges 4 due tothe provision forventing of, air in the interior of the'tank 3 through thevent flange 5'. "When "the tank 4 merse'd in the molten spelter 2, are slowly r0 3 j issubstantially half int-'- tated for one or more revolutions in order that 'i' the moltenspelter 2 on the interior of the tank 3 shall provide complete coverageuofthe interior walls of the tank.3,.-the screw-threaded interior of flanges I4 and 5, and all' exterior: surfaces of is providedin' the tank solely" for the purpo e; 0'! facilitating full and'thoroughf plating oithe' interior or the tarrkt according to the principles of this invention;

the tank a and flanges! and s; While the tank 3 is being immersed and rotated in the spelter. 2 in. the tank I; the vent plug 8, which is an exteriorly threaded plug adapted for screw-threaded insertion in thevent flange 5, is immersed .and suspended in the molten spelter 2' in such Figure 3 is a fragmentary-view, partly in sec! manner that all surfaces thereof are fully pro screw threadeldly.attached-in the .vent flange 5.

br the tank a This occurs while the spelter adhering to the surfaces of the-flange 51 and plug 6is stills'ufliciently hot to permit fusing of the galvanized. surfaces; topro'vide an absolute seah, Optionally, in order to improve the completeness of the seal between flange 5 and plugs; solder I is applied to the exposed threaded joint, as shown in Figure'4.

By this process, complete protection, of all surfacesg'both interior and exterior,- of the tank- 3,

is ,achievedwith-easeand facilityliitherto' unknownin the priorart; The process. eliminates v necessity for rte-dipping incompletely platedfor.

galvanized tanks because, according to the prin-' i" ciples of this invention, complete protective cov Patent is:

erage by galvanizing of all surfaces of each tank is achieved.

In Figure 4, the galvanized plating or covering is designated 8 and, as shown in that figure, complete coverage of all surfaces of the tank 3, the flange 5 and plug 5 is achievedin such manner as to impart to the tank 53 the properties, with respect to resistance to corrosion and rusting, of a tank formed entirely of the spelter material.

While the above description applies to the plating of tank structures by galvanizing, it is, of course, to be understood that the principles of this invention are susceptible to various other applications, such as coating operations, electroplating and the like, wherein the provision of the vent opening, for admitting the coating material or electrolyte, materially increases the completeness of the interior protective covering, and wherein the coating of the vent closure plug in the same manner as the tank provides uniform protective coverage tor all exposed surfaces of the tank.

It will be understood that-the above-described structure is merely illustrative of the manner in which the principles of my invention may be utilized and that I desire to comprehend within my invention such modifications as come within the scope or the claims and the invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters 1. In a method of manufacture of galvanized tanks, (1) constructing a tank with inlet and outlet openings, (2) forming a vent opening in said tank disposed oppositely from at least one,

of said first-named openings, (3) immersing the tank downwardly, half way, into a molten spelter bath, with-the vent opening disposed upwardly for releasing air from the interior of the tank, and thus allowing the spelter to contact hair" of the inner and half or" the outer surfaces or the tank, (4) rotating the thus immersed tank in the molten spelter bath about a central axis located in the plane of the surface of said bath to secure full coverage by the spelter of all interior and exterior surfaces thereof, (5) removing the tank upwardly from the bath with thevent opening disposed upwardly, and (6)- inserting in the vent opening a closure plug which is covered with molten spelter while the spelter on the plug and in the vent opening are still molten, thereby allowing the molten spelter on said plug to unite with that on the vent opening and to thus form an absolute seal.

2. In a method of galvanizing a tank having an opening on one side thereof, (1) forming a vent opening in said tank oppositely disposed from said first-named opening, (2) immersing the tank halfway in a molten spelter bath with the vent opening disposed upwardly for venting interior air from the tank and permitting unobstructed entrance of the molten spelter through said first-named opening into the tank interior and thus allowing the spelter to contact half of the inner and half of the outer surfaces of the tank, (3) rotating the thus immersed tank about plug and in the vent openings are molten, whereby the molten spelter on the adjacent and contacting surfaces oi said plug and said vent opening unite with each other andiorm an absolute seal.

near, EIUEQEYER. 

